Stylesheet only loading partially for Matomo UI

It seems that a stylesheet doesn’t get fully loaded when viewing the reports page. Half of the elements are not styled.
See: https://imgur.com/KQeE6ye

There are no errors in the dev console & only one css file gets loaded: wp-content/plugins/matomo/app/index.php?module=Proxy&action=getCss&cb=40e50d7deb295d8d713555a075bb0f9d

I tried in on multiple wordpress installations and servers. Also I have no blocking scripts running in the browser.

Do you have any tips?

Hi @101development

Can you share with us your system report available from the menu Matomo Analytics > Diagnostics?

Kind regards

Thank you for your assistance! I already tried to switch the theme to a default theme and disabling all plugins but i forgot to “Clear Matomo Cache” after each change. I found out that the problem is that our custom theme also uses the http://leafo.net/lessphp library.

We customized the less library for our needs but also in its original state the issues exists. I renamed the classes of our less library, as it custom anyway, and everything seems to work now!

Regards, Michael